As I worked, I continued on with the intent of keeping my original repair panel for the master cylinder shelf. It won't be pretty, but after I cut out my previous welds and made some mods, I was able to get it nice and level. I set a long piece of angle iron across it from the passenger side as I was getting it close, and then I used a spare pedal box to actually finalize the fit. I was able to save 3 of the original weld nuts on the right side of the pedal box. The 3 on the left side closest to the wing are gone, I just drilled them through. I think I can get away with a bolt and a nut on the bottom. I will need a helper for installation. Likely tricky with the dash and whatnot installed, but I manage to work on modern cars so I think it can be done.